I recently moved my small machine shop to a new location. Both locations had 3-phase power, and I wired up a 3-phase air compressor in both locations.
In both locations, I used the convention of black-red-blue wiring on L1-L2-L3 bus bars in the electrical panel.
But in the new location, the motor is running backward, indicating reversal of two of the wires (or that the previous location was “incorrect”).
I can't find anything online that says L2 should lag L1 by 120°, and L3 should lag L2 by 120°, but is that the convention? Are the mains leading into my panel (new or old) mis-wired? Or did I just make a mistake somewhere?
My specific question: what is the required phase relationship between L1, L2, and L3 (if any)?